<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Hello World!</title>
    <script type="text/javascript" src="../assets/js/vue.js"></script>
</head>
<body>
    <h1>v-for</h1>
    <hr>
    <div id="app">
        <ul>
            <li v-for="item in sortItems">
                {{item}}
            </li>
        </ul>
        <hr>
        <ul>
            <li v-for="(student,index) in sortStudents">
               {{index+1}}: {{student.name}} - {{student.age}}
            </li>
        </ul>
    </div>

    <script type="text/javascript">
        var app=new Vue({
            el:"#app",
            data:{
                items:[23,40,5,36,28,76,67],
                students:[
                        {name:"JSPang",age:33},
                        {name:"BingYe",age:37},
                        {name:"KengFei",age:30},
                        {name:"JianJian",age:31},
                    ]
            },
            computed:{
                sortItems:function(){
                return this.items.sort(sortNumber)
               },
               sortStudents:function(){
                   return sortByKey(this.students,"age")
               }
                
            }
        });

        function sortNumber(a,b)
        {
            return a-b;
        }

        function sortByKey(array,key){
            return array.sort(function(a,b){
                var x=a[key];
                var y=b[key];
                return ((x<y)?-1:((x>y)?1:0));
            });
        }
    </script>
</body>
</html>